Related Clues:

• Crass
• Lacking culture
• Oil by the barrel
• Needing refinement
• Tanker filler
• Like oil directly from a well
• Unrefined oil
• Unrefined cargo
• Oil directly from a well
• Well-made product?
• Oil refinery input
• Coarse and unrefined
• Tasteless, not refined
• Not refined, say oil
• Not refined, like oil